Cotter-pin puller



'w H BURKE I IIIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIII/IIII COTTER PIN FULLER Filed May 28. 1925 Aug. 9, 1927.

Patented Aug. 9, 1927.

I PORATION or LLINOIS.

i s rata :1:

WILLIAM H. BURKE, orwIN Ea, SOUTI-IYDAK'OTA, AssIe oanY'nmEoTnNnMESNE" ASSIGNMENTS, To THE BURGAN CORPORATION, or CHICAGO, ILLINOIS, A coni coTTER-TIN FULLER.

Application fil ed Maize, 1925'. Serial Nb. 33,556: i

This invention relates particularly to a tool for extractingcotter pins, keys and like pin-like elements from a machine element or part, the object of the improvements being to provide a tool which will enable: the user to expeditiously removethe cotter .pin by-a single operation of the hand. 7 I

The invention further aims to provide a cotter pin pullerby, which an extracting force is applied to a pair of gripping jaws after the latter have been closed against the 1n. j Further, theinvention resides'in the pro vision of a combined j aw-clos'ing and powerapplying -means whereby, upon a Single voperation, the gripping jaws will first; be rendered operative and thenmoved away fromthe machine part, carrying the pin with it. I v

The invention further resides in the salient features of construction, and the ar-, rangements and combinations of parts hereinafter described in detail and claimed succinctly, reference "being made to the accompanying drawing depicting the preferred embodiment of my lnvention, and

' wherein Figure 1 is a front elevation of my improved, cotter pin puller, illustrating the same inoperative and showing in dotted lines the closing of the jaws upon the initial movement of the handlesteward each other;

Fig. 2 is a side elevation thereof;

1 Fig. 3 is a front elevation of the tool fullyoperative or with the cotter pin extracted;

and

Figs. 4 and 5 are detailed cross sectional views taken on lines Hand 5v5, respecjtively, of'Fig. 1.

Referring more in detail to the accompanying drawings, thenumeral 1 designates the jaw lever to which the power lever 2 is pivoted at 3 and deflected thereacross 1n the form of a shorter arm later to be referred to.

The jaw lever is broadened about thepivot 3 and'form'ed with an offset, integral jaw 4, theoifset forming a shoulder 5 on which is pivoted at 6 a movable jaw The outer end of'the movable jaw termm'ates 111 a point or hook 8 inturned tooppose an anvil-like point 9 on the fixed jaw.

' Pivoted to the outer 'en d'of the Shorter arm of the power lever, as at 10, is a fulcrum' member 11 which is channeled to embrace the movable jaw and haveslidable, guiding and bearing relation therewithas will'be more fully set forth hereinafter. Thefulcrum member has a rigidly carried arm or strap 12 extending about the outer or back edge of the fixed jaw 4E and on opposite sides of both-jaws, and is'designed .toride and bear on'said back edge 13, riding from a recess or seat 15 up over an abrupt rise or shoulder 14:. The fulcrum member, has av laterally extending pin 16designed to engage a lug 17 projecting from the pivoted end of i g the movable jaw7, as depicted in Fig. 1.

In operation, the handle ends of levers 1 and 2 are separatedjwidely, as in Fig. 1,-

wherein it will be noted that the pin l6- has moved againstlugl'? and; opened'jthe movable jaw away from the fixed jaw 4, in

which position the outer end of the strap'12 is engaged in the recess or seat 15. Upon closing the handlespthe initial operation. moves the pin 16 from the lug 17 and would leave the "movable jaw free to swing were it not for the fact that the outer end "of the strap 12 concurrently rides up" the call shoulder 14 and pulls the fulcrum member over againstthe outer end of said movable jaw and pushes it into cooperative relation with thefixe'd j aw, as depicted'in the dotted showing in" Fig. 1. Furtherclosing movement of the handles retains the jaws locked shut, by reason of the sleeve-like or ringlike member 1.2 riding over the cam surface 13 (which is substantially parallel to the. movement of the fulcrum member'),'ancl tl1e' fulcrum member is brought into bearing contact: with the machinefipart, following which the gripping jaws will move bodily away from said machine part, 'carrying'the c pi'n'with them. 1 I I I,

Upon opening the handles, the embracing member 12 slides *off'the cam" surface into its seat 15 and simultaneously therewith the forreleasing the cotter pin just extracted.

The construction is exceedingly simple and durable, the strap member 12 not only closing the movable jaw butalso prevents the like machine elements.

fulcrum member from swinging out of position as well-as serving to steady the'same when the tool is fulcrumed thereon.

While I have described any extractor or puller in connection with cotter pin removal,

thesame may-be applied to many similar uses and with a slight change in the shape of the the device may be utilized in the removal of keys from shafts, cross pins and Obviously, the design and-arrangement of the several parts may be changed as'permitted within the scope of the appended claims and without departing from the spirit of my invention.

What is claimed is:

1.' A pulling tool comprising'pivoted cross handles, one endo f one handle being formed with an integral aw, a fulcrum" i'nember pivoted to the corresponding end of the companion handle, and a movable jaw clos able against the integral jaw by the fulcrum member. 2. A cotter pin puller comprising a pair 'oflever-s pivotallyv connected to provide manipulating handles and power arms, a jaw on thepower arm of one i ver,a fulcrum member" connected to'the power arm of the companion lever, and means operable by and during. relative movement between the aw and the fulcrum member for cooperating with said jaw to grip aninterposed cotter pinj' 3. A cotteri pin puller, comprising a pair of-"levers pivotally connected to provide handles on one end and power arms on the oppositecnd, a aw on the power arm of one lever, a movablej'aw pivoted to said last named lever for cooperation with said first .nientioned jaw, and means operable by the I ower arm of the companion lever for en gaging both jaws to close them.

,4. A cotter pin puller comprising pivotally connected levers providing operating levers and oppositely disposed power arms,

onefpower arm having a canisurface, a jaw fixed. onthe latter arm, a cooperating aw .movably connected to thefixcd jaw, and

two jaws for closing the latter, and means for opening the jaws when the first means is inoperative.

closing 6. A cotter pin puller comprising a shank carrying a fixedjaw one one end, a coo 3G1- ating jaw pivoted on the shank, means for closing the jaws, and means for exerting a pull on the closed jaws.

7. A cot-t er pin puller comprising a pair of cooperating aws movably connected,

means for exerting a pull on the jaws, and means for locking the aws closed'by and during actuation ofithe first means.

8. A cotter pin-puller comprising a ful-v crum member, a. lever pivoted thereto, a

pair of ripping aws operatively connected together and pivoted as alunit to said lever,

'' and means carriedby thefulcrum member with the aws for operating the to cooperate same- V 9, Acotter-pin puller comprising. a fulcrum member, a lever pivoted thereto, a pair of gripping jaws operatively connected together and pivoted as a unit to 'sz tid lever, one jaw having a cam portion, and-"means carried by the fulcrum member and cooperating with the cam portion of the jaw for the latter against the companion jaw. I

10. A cotter 'pin'puller comprising a fulcrum member,a lever pivoted thereon, a, gripping aw'extending alongside the fulcrum member and formed with a cam porall tion having an initialv abruptrise, a cooperatin'g jawinterposed between the first jaw and the fulcrum member and adapted to be backed by the latter whereby the-first jaw may be moved againstthe second jaw for 'gripping'an obj.ect,' and" means carried by the fulcrum member for coacting with the cam portion of the first'jaw to effect a closing together of the jawsrand' then hold them'so closed during the lifting of the lever on its fulcrum member topull on the object. V

11. A cotter pin. puller comp'risinga ful-i crum member, av lever pivoted thereon, gripping extending alongside' the ful-v crum member andformedwith a cam por-- tion havingan initial abruptrise, a cooperating jaw interposed between the first jaw and the fulcrum member and adapted to be backed by the latter whereby the first jaw may be moved against the second jaw for gripping an object, means carried by the fulcrum member for co-acting with thecani portion of the first jaw to effect'a closing together of the jaws and then holdthem so closed during the lifting of the lever on its fulcrunimember to pull on the object, and

means for opening the jaws upon reverse movement of the lever.

12. A cotter p n puller comprising a fulcrum member, a lever pivoted thereon,

gripping jaw extending alongside the ful crum member and formed with a cam portion having an initial abrupt rise, a cooper-- ating jaw interposed between the first jaw and the fulcrunrmember andadapted to be backed by the latter whereby the first aw may be moved against the second jaw for gripping an'object, means carried by the fulcrum member fOr'co acting with the cam portion of the first-jaw to effect a closing together of the'jaws and then hold them so crum member, a lever pivoted thereon, a j aw lever pivoted to' the first lever, ajaw pro-.

vided on the second lever opposite the fulcrum member, a cooperating jaw between the fulcrum member and the first-j aw pivotally connected to the latter, and means for closing and opening the jaws upon relative closing and opening movements of the levers.

'14. A cotter pin puller comprising'a ful-- crum member, a lever pivoted thereon, a jaw lever pivoted to the first lever, a jaw provided on the second lever opposite the fulcrum member, a cooperating jaw between the fulcrmnmember and the first jaw pivotally- .connected to, the latter, said fulcrum member being channeled to receive the second jaw,

and means carried by the fulcrum member for opening and closing the j aws.

15. A cotter pin puller comprising a fulcrum member, a lever pivoted thereon, a' jaw lever pivoted to the first lever, a jaw provided on the second lever oppositethe ful crum member, a cooperating jaw between the fulcrum member and the first jaw pivotally connected to the latter, said fulcrum member being channeled to receive the second jaw, means carried by the fulcrum member for cooperation with the first j aiw to effect a closing together of the two jaws, and means for swinging the second jaav away from the first jaw when the two jaws have been released by said first means.

16; A cotter pin puller comprising apair of pivotally connected jaws, a lever, con-, nected thereto, a fulcrum member guidingly embracing the jaws, and a lever connected to the fulcrum member and pivoted to the first a pin or the like, a part adapted to abut lever.

17. Acotter pin puller comprising casing-like fulcrum member, a handle, connect ed thereto, cooperating gripping jaws guided in the member, and a handle pivoted to the first handle for sliding the jaws in the member.

' 18; A pulling toolv comprising a pair of handles, a member connected to one handle, a pair of jaws slidably guided by themember and operable by the other handle, and means for closing the aws upon an article.

19. A cotter pin extractor comprising pivon the object.

votally connected aws, member slidably re- I lated to the jaws, means for sliding the mem-' ber relative to the jaws, and means for Topf erating theijawsby and 'duringtherelative sliding movement of vsaid member, and to engage an article therebetween; 20.:A cotter pinpuller comprising a fulcrum member, a handle connected thereto, a grlpplng aw extending alongsidethe. fulcrum member andformed with a cam portion, and a cooperating jaw interposed between the first jaw and the fulcrum member and'adapted to be backed by the'latter 1 whereby the first jaw may be moved againstthe second jaw for gripping an object, said fulcrum member having means for coacting' with the ca'm portion of the first jaw to effect a closing together of the jaws and then hold them so closed during the liftingof the lever on its fulcrum member to pull 21. In a hand tool, a pair of opposed' article engaging members one of which is movable toward and awayfrom theother,

a guiding member for supporting and guidmg said pair of members, said guiding memher and said pair of members being longitudinally slidable relatively to each other, Y

means to move said guiding member relatively to said pair of members and means operable by said guiding means during theafora said relative longitudinalsliding movement to vmove said other. n

22. In a hand tool, 'a slidable member having free end, said end being adapted to engage an article holding another article to be removed therefrom, a lever pivoted to said member, a pair of article engaging aws, means to connect sald aws .together and to said lever, means associated and slidablewith said member to operably engage pair of members toward each said jawsto cause them to engage an article therebetween, and means to move saidmembers and sa1d aws 1n opposlte dlrectlons whereby the article engaged by the free end of said member is separated from the article engaged by said jaws to removethe latter article from the former.

23. A hand tool for withdrawing apin or the like from a'member holding thesame comprising a pair of jaws adaptedto grip the member holding the pin, means to pro-- duce a relative movement between the pair of jaws and said part in'a longitudinal direction withrespect to the pin, and cooperat said, jaws upon the pin.

mg means between said jaws and saidpart, operative by andsubstantially 'at the beginning of the aforesaid movement to close 24.111 .a hand'tool, a. pair of opposed: article engaglng members, one of said memrelatively to said pair ofmembers, means operable by said guiding means (luring its longltuclmal sll'cllng movementto move sa cl pair of members toward each other to engage an illtlClB therebetween, and cooperat- 111g member ancl saicl'pair of membersbeing ing means between one of said pair of members and sail guiding means and operable during the sliding movement" of sai cl guicl ing means tomove said pair of members away from each other to release an article from engagement therewlth.

' In testimony whereofI affix my signature.

WILLIAM H. B E. 

